Finisar Surveyor 用户手册

下载
页码 454
10-50
Surveyor 
User’s Guide
TCP Repeat Ack
Counter
The TCP Repeat Ack counter increments when the TCP acknowledgment number is 
less than the immediately preceding acknowledgement. A count of all TCP Repeat 
Ack events displays in the 
Overview
 counters of Expert View. 
Expert Symptom
TCP Repeat Acks are automatically logged as expert symptoms. The 
Symptom 
Summary
 field indicates that the acknowledgement numbers are out of sequence. 
For example:
Acknowledgement number is less than the one before
Diagnostic Details
__________________________________________________________________ 
Problem Description: 
A TCP/IP acknowledgement number is less than the one before.
 __________________________________________________________________ 
Probable Cause(s):
1. The network is overloaded. 
2. There may be a problem with the sender’s TCP/IP stack. 
__________________________________________________________________
Recommended Action(s):
1. Update the sender’s TCP/IP stack.